lh28f008sc Sharp Microelectronics of the Americas, lh28f008sc Datasheet - Page 19

• Manufacturer Part Number: lh28f008sc
• Description: 8m 1m ? 8 Flash Memory
• Manufacturer: Sharp Microelectronics of the Americas

8M (1M × 8) Flash Memory
READ STATUS REGISTER
LOCK-BITS COMPLETE
FULL STATUS CHECK PROCEDURE
CHECK IF DESIRED
REGISTER DATA
CLEAR BLOCK
READ STATUS
CLEAR BLOCK
FULL STATUS
SUCCESSFUL
WRITE D0H
WRITE 60H
(see above)
LOCK-BITS
SR.4, 5 =
START
SR.7 =
SR.3 =
SR.1 =
SR.5 =
YES
YES
0
1
1
1
1
1
0
LOCK-BITS ERROR
SEQUENCE
V
COMMAND
PROTECT
CLEAR BLOCK
PP
DEVICE
ERROR
ERROR
ERROR
RANGE
Figure 11. Clear Block Lock-Bits Flowchart
OPERATION
Write FFH after the Clear Block Lock-Bits operation to
place device in read array mode.
SR.5, SR.4, SR.3 and SR.1 are only cleared by the Clear Status
Register command.
If error is detected, clear the Status Register before attemping
retry or other error recovery.
OPERATION
Standby
Write
Write
Read
Standby
Standby
Standby
Standby
BUS
BUS
Lock-Bits Setup
Clear Block
Clear Block
COMMAND
Lock-Bits
Confirm
COMMAND
Check SR.3
1 = V
Check SR.1
1 = Device Protect Detect
RP = V
Check SR.4, 5
Both 1 = Command
Sequence Error
Check SR.5
1 = Clear Block Lock-Bit Error
Data = 60H
Addr = X
Data = D0H
Addr = X
Status Register Data
Check SR.7
1 = WSM Ready
0 = WSM Busy
PP
IH
Error Detect
, Master Lock-Bit is Set
COMMENTS
COMMENTS
LH28F008SC
28F008SC-11
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